package com.sky.aspect;

import com.alibaba.druid.support.logging.Log;
import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.data.convert.JodaTimeConverters;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * @author kai
 * @version 1.0
 * @date 2024/3/22
 * @Description 实现公共字段自动填充
 */

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    /**
     * 切入点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autofillpointcut() {}


    /**
     * 前置通知，在通知中进行公共字段的赋值
     */
    @Before("autofillpointcut()")
    public void autoFill(JoinPoint joinPoint ) {
        log.info("公共字段自动填充");

        //获取到被拦截的方法的数据库操作类型
        MethodSignature signature = (MethodSignature)joinPoint.getSignature();
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType value = annotation.value();

        //获取到被拦截的方法的参数--当前方法
        Object[] args = joinPoint.getArgs();

      /*  if (args == null || args.length == 0) {
            return;
        }*/
        if (args == null || args.length == 0) {
            return;
        }



        //准备赋值的数据
        Object arg = args[0];
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();


        //根据当前不同的操作类型，为对应的属性通过反射来赋值
        if (value == OperationType.INSERT) {
            //为四个对象赋值
            try {
                Method setCreateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method srtCreateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //通过反射为对象赋值
                setCreateTime.invoke(arg,now);
                srtCreateUser.invoke(arg,currentId);
                setUpdateTime.invoke(arg,now);
                setUpdateUser.invoke(arg,currentId);

            } catch (Exception  e) {
                e.printStackTrace();
            }

        } else if (value == OperationType.UPDATE) {
            //为两个对象赋值
            try {
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //通过反射为对象赋值
                setUpdateTime.invoke(arg,now);
                setUpdateUser.invoke(arg,currentId);

            } catch (Exception e) {
                throw new RuntimeException(e);
            }

        }


    }



}
